三孚股份：公司采用循环经济模式，具有一定的原材料优势及成本优势

Core Viewpoint - Sanfu Co., Ltd. (603938) emphasizes its high-purity silicon tetrachloride products are primarily used in the production of optical fiber preforms and synthetic quartz [1] Group 1 - The company adopts a circular economy model, which provides certain advantages in raw materials and cost [1] - The product quality is excellent, enabling large-scale supply for the PCVD core rod production process, which has stringent raw material requirements [1] - The company has achieved import substitution in its product offerings [1]